My girlfriend never says "Thank you" or "I'm sorry". Do I have a right to be upset with her?

Anonymous
Last week she accidently dropped pasta sauce on my new shirt but never apologized and showed no signs of remorse. She expects me do to a lot of stuff for her but I don't get a single thank you after doing them. It could have somthing to do with her culture and how her parents raised her. She is an only child so her parents always coddled her growing up.
My girlfriend never says "Thank you" or "I'm sorry". Do I have a right to be upset with her?
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